MANALAPAN – Fire crews battled flames through the roof of Gus’s Diner in Manalapan early Tuesday, and the business will remain closed until further notice, police said.

Emergency responders were called around 1:45 a.m. and the fire was extinguished shortly after, according to police. There were no injuries and the majority of the damage was from water putting out the flames.

The fire appeared to be accidental, but remains under investigation by Monmouth County Deputy Fire Marshal Rick Hogan and Manalapan police Det. Charles Alaimo, police said.

Police said the diner was closed when the fire started and don’t know when it will reopen, as it was undergoing an addition before the incident.

The Department of Transportation shut down Route 33 eastbound for about two hours because of the fire, police said. Manalapan Fire Company #1, Gordon’s Corner Fire Company, Englishtown Fire Company, Adelphia Fire Company and Freehold Borough Fire Department responded and Englishtown-Manalapan First Aid Squad assisted.